Thank you, Dicho...yes, my sisters testimony bears out exactly what you say. She tried and tried to get rid of the problem, and it took cleaning everything made of cloth, and keeping pillows, etc. in bags for several weeks to end the infestation. Even if the bugs themselves don't live long off of the human body (and my understanding is exactly yours...3-4 days), the nits can hatch out a couple of weeks later, and if they're on your pillows, you have a problem again.